<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2017/9/19
 * Time: 14:43
 */

header("Content-type:text/html;charset=utf-8");
$fun2 = function($a){
    echo $a."你好";
};

$fun3 = $fun2;	#传值，$fun3,$fun2,被修改时，互不影响
$fun3('frank');